Home / 111,985.28-154,485.24-71,666.72

Finding the Fourth Proportional to 111,985.28, 154,485.24 and 71,666.72

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Solution

The fourth proportional to 111,985.28, 154,485.24 and 71,666.72 is: 98,865.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,985.28 : 154,485.24 = 71,666.72 : x
  2. Step 2: Convert to fraction form
    111,985.28/154,485.24 = 71,666.72/x
  3. Step 3: Cross multiply
    111,985.28x = 154,485.24 × 71,666.72
  4. Step 4: Simplify right side
    111,985.28x = 11,071,449,666.79
  5. Step 5: Solve for x
    x = 11,071,449,666.79/111,985.28
  6. Step 6: Final answer
    x = 98,865.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.